Rotor



Aug. 31, 1926. 1,597,666

J. M. BARR RO'IOR Original Filed Dec. 6. 1922 3 Sheets-Sheet 2 I il H ilD gli" 1.i l! |12 Q 3 Sheets-Sheet :5

J. M. BARR KOTOR Original, Filed DBC. 6. 1.@2

Aug. 31, 1926.

Patented Aug. 31, 1926.

UNITED sTATEsl PATENT OFFICE.

.Tomi I. mma, or nm, rmsvulm Assmann 'ro m Louis uns conm,

or mwaum, wisconsin, A conrona'rron or wisconsin.

BOTOX centinaia e: mman semi ne.

. invention relates to a rotor and the in the slots, and end'ringsconnected to the-longitudinal conductors.

The diicul that has been experienced in l0 emplo a eet metal winding hasbeen in fastenin and retaining its longitudinal conductors in place.

This ap lication is a continuation` of plication led December 6, 1922,Serial 16 605,228, as to matter common to both applications.

An object of this invention is to provide the rotor with a sheet metalwinding which has its longitudinal conductors firmly held in a definiteand fixed position in the slots.'

Another object is to rovide a-rotor which is strong, durable aneiicient, and which may be readily and economically manufactured.

The invention contemplates a rotor provided with a sheet metal windinghaving its end rings perimetrically contracted to exert a continualinward radial pull u on its longitudinal conductors to hold t ein infirm I0 contact with the bottoms of the slots or other seats therein.

An eicient and ex editions way toapply the windin and ma e the rotor isto roll a fiat win ing upon the core, then unite 85 its end rings tomake them continuous, and

finally contract the end rings to cause them Y to exert a continualinward radial pull upon the longitudinal conductors.

' This invention provides a rotor with a sheet metal winding, the lon'tudinal conductors of which are vfasten@ and retained in the slots in adefinite and fixed position.

These conductors will not become loosened or displaced by' centrifugalor magnetic force and will not cause an noise.

The method that may employed in making the rotor is hereinafterspecifically. set forth. i

The accompanying drawingsillustrate a NPI.

rent capacity thereof.

015,888, lled December 6. 1988. Hdl sapplicatie-ii llled Januar-R20, y1m. dll l0. m. f d

rotor this invention. and machines that may be emtplloyed in makin suchrotor end the views erein are as fo ows:

Fig. 1 is a perspective view of the rotor.

Fig. 2 is en end view thereef,he1f in i tion2 on the lines 2-2 of Fig.3.

Fig. 3 isa lon 'tudinal sectional view on the line 343 of ig. 2.

'Fig. 4 is a plan view of the fiat sheet metal winding.

Fig. 5 is a sectional side view of a rolling machine for applying thewinding to the core.

Fig. 6 is a front view of the rolling ma` chine. Y

Fig. 7 is a side view of a settin machine for setting the longitudinalcon uctors in place and expanding the same.

Fig. 8 is a sectional side view of a contracting machine for contractingvthe end rings.

Rotor. l

The rotor is provided with a cylindrical laminated core 1 havinglongitudinal peripheral slots and a sheet metal winding having integrallongitudinal conductors 2 and circular end rings 3.

The longitudinal conductorsare arranged' within the slots and bear uponthe bot toms thereof or other seats therefor.

The end rings are perimetrically contracted or otherwise caused to exerta continual inward radial pull upon the longitudinal conductors.

Accordingly, the longitudinal conductors are held in firm engagementwith the seats therefor in the slots and thereb fastened and retained ina definite and xed position.

The longitudinal conductors may be laterally expanded within the slotsto impinge upon the side of the walls thereof and thereby aid in holdingthem in place.

The end rin may be folded or doubled to strengthen t e same and increasethe cur- The winding may be ap lied to the core and its end ringscontrae in various ways. l

5 and make the rotor.V

It may consist of' a. single sheet metal piece or of several sheet`metal pieces joined together.

The end rin s by exerting a continual inward pull hold the longitudinalconductors in a fixed andl definite position from which they will notbecome loosened or displaced by centrifugal or magnetic force.

The method that may be employed in making the rotor will now beexplained.

Method -of making rotor.

The sheet metal winding in its original form, before it is applied tothe core, is flat, as illustrated in F ig. 4.

This flat winding is made from `a flat rectangular metal sheet in whichare formed parallel slits at the ends Aof which are circular holes.

The strips betweenthe slits are turned or bent to a suitable angle toform the longitudinal conductors.

The strips which connect the longitudinal conductors are doubled orfolded and ultimately form the end rings.

The ends thereof are sha d to enable the same to be united together y alap joint.

The flat winding may be rolled into place upon the core and then itsedges are welded or otherwise united to form the continuous circular endrings.

The end rings are finally perimetrically contracted or shortened toexert a continual inward radial pull upon the -longitudinal vconductorsto hold them in firm contact with the bottoms of the slots or otherseats there- If the longitudinal conductors do not engage the bottoms ofthe slots after the Wind-- ing is rolled upon the core, they may bedriven or forced into engagement therewith before the end ringsarevcontracted.

The junctures between the longitudinal conductors and end rings are bentin course of setting the longitudinal conductors in place andcontracting the end rings, and thereby the metal therein is worked tostrengthen the same.A

The longitudinal conductors may be expanded within the slots to impingeu n the sides thereof and thereby aid in olding them in place.

f course, other ways and methods may be employed to apply the winding tothe core The machines that may be employed for making the rotor andperforming the process employed therein are hereinafter explained.

Rolling machine for applying winding- Figs. 5 and 6.

5 upper rollers 5 and 6.

1,597,eoo

These rollers are mounted upon shafts 7 and 8, and theleft lower rolleris removable to permit the rotor core to be placed upon the lower shaftbetween the lower rollers.

The intermeshing gears 9 mounted upon the shafts cause the upper andlower rollers p to rotate in unison.

The winding is rolled from its flat form into a circular form upon thecore by passingtit between the upperv and lower rollers.

' final position in the slots, they may be forced or driven into suchposition before the end rings are contracted.

Setting machine for placing in final position-Fig. 7. The settingmachine for driving or forcing the longitudinal conductors intoengagement'with the bottoms of the slots is provided with a roller 12,which has teeth 13 ar- ,i

ran ed in parallel rows.

T ese teeth engage the longitudinal conductors, and the alternate teethin each row are preferably offset.

The roller is turned upon a shaft 14 and the rotor is carried by a shaftor arbor 15 and turns in unison with the roller.

When the longitudinal conductors are engaged b the teeth, they are setin final position in t e slots, and they may have sulicient pressureexerted thereon to cause them to be expande-dA laterally within theslots to impinge upon the sides thereof.

Of course, it is feasible under some conditionsto set the longitudinalconductors in final position after the end rings are contracted.

Uontractz'ng The contracting machine for perimetk'ically contracting theend rings is provided with a stationary base 16, and a movable plunger17. Y

The base is provided with a vertical post 18 on which the rotor isplaced between circular u pper and lower blocks 19, which limit theinward contraction of the end rings.

These blocks and the rotor are vertically movable upon the post and areresiliently supported upon a spring 20 arranged between the base and thelower block.

The base 16 has thereon a lower contracting ring 21 in which are setjaws 22 spaced apart engaging the lower end ring and having a'supporting ring 23.

imilar jaws 24 having a supporting ring 25 engage the upper end ring andset within an upper contracting ring 26 upon which bears the movablelunger 17.

The 'aws are he d in position relative to 'each ot er by a spacing ring27 in which set When the longitudinal conductors are set in place andagain when the end rings are contracted, the junctures between theoonductors andthe end rings are radially bent, and thereby the metaltherein is worked .and

strengthened.

Of course, the invention herein set forth is susceptible of variousmodifications which will be within the claims hereof.

The invention is hereby claimed as follows:

1. A rotor comprising a cylindrical core having longitudinal peripheralslots, and a sheet metal winding having longitudinal conductors arrangedin said slots and end rin s exerting a continual inward pull upon sailongitudinal conductors to. hold the same firmly against seats thereforin said slots.

2.` A rotor comprising a cylindrical core having lon itudinal peripheralslots, and a sheet metal winding having longitudinal conductors arrangedin said slots and endv rings having circular perimeters and exerting acontinual inward pull upon said longitudinal conductorsv to hold thesame firmly against seats therefor in said slots.

3. A rotor comprising a cylindrical core having .lon itudinal peripheralslots and a sheet meta winding having longitudinal conductors arrangedin said slots and circular end rings perime-trically contracted to exerta continual inward pull upon said longitudinal conductors to hold thesame against seats therefor in said slots.

4. A rotor comprisin a cylindrical core having longitudinal peripheralslots, and a sheet metal winding having longitudinal conductors arrangedin said slots and .laterally expanded to impinge upon the .sides thereofand circular end rings perimetrically contracted to exert a continualinward l pull upon said longitudinal conductors to hold the same againstseats therefor in said slots.

5. A rotor comprising a cylindrical core having longitudinal peripheralslots, and a sheet metal winding having longitudinal conductors arrangedin said slots, and folded end rings perimetrically contracted to exert acontinual inward pull upon said longitudinal conductors to hold the sameagainst seats therefor in said slots.

6. A rotor comprising a cylindrical vcore' having longitudinalperipheral slots, and a sheet metal winding having longitudinalconductors arranged 'in said slots, circular end rings lperimetricallycontracted to exert a continual inward pull upon said' longitudinalconductors to hold the same against seats therefor in said slots, andradially bent junctures between said longitudinal conductors and saidend rings. f

'i'. A rotor comprising a cylindrical core having longitudinalperipheral slots, longitudinal conductors arranged in said slots andlaterally-expanded to impinge upon the sides thereof, and circular endrings perimetrically contracted to exert a continual inward radial pullupon said longitudinal conductors toV hold the same against seatstherefor in said slots.

8. A rotor comprising a cylindrical core having longitudinal peripheralslots, longitudinal .conductors arranged in said slots, circular endrings perimetrica-lly contracted to exert a continual inward radial pullupon said longitudinal conductors to hold the same against seatstherefor in said slots, and radially bent junctures between saidlongitudinal conductors and said end rings.

9. A rotor comprising a cylindrical core having longitudinal peripheralslots, longitudinal conductors arranged in said slots and laterallyexpanded to impinge upon the sides thereof, lcircular end ringsperimetrically contracted to exert a continual inward radial pull u onsaid longitudinal conductors to hold the same against seats therefor insaid slots, and radially bent junctures between said longitudinalconductors and said end rings.

10. The method of making a rotor provided with a cylindrical core'havinglongitudinal eripheral slots and a winding having longitudinalconductors arranged in said slots and circular end rings connected tosaid conductors, consisting in applying said winding to said core, andperimetrically contracting said end rings to exert a continual inwardradial pull upon said conductors to hold the same against the seatstherefor in said slots.

11. The method of making a rotor provided with a cylindrical core havinglongitudinal peripheral slots and a winding having longitudinalconductors arranged in said slots and circular end rings connected tosaid conductors, consisting in applying said winding to said core,perimetrically contracting said end rings to exert a continual g inwardradial pull upon said conductors to hold the same against thc seatstherefor in said slots, and expanding said conductors to impinge againstthe sides of said slots.

12. The method of making 'a rotor provided with a cylindrical corehaving longitudinal peripheral slots and a winding having longitudinalconductors arranged in said slots and circular end rings connected tosaid conductors, consisting in applying said winding to said core,perimetrically contracting said end rings to exert a continual inwardradial pull upon said conductors to hold the same against the seatstherefore in said slots, and radially bending the junctures between saidconductors and end rings in applying said winding to said core.

l 13. The method of making a rotor provided withl a cylindrical corehaving longitudinal peripheral slots and a winding having longitudinalconductors arranged in said slots and circular end rings connected tosaid conductors, consisting in applying said winding to said core,perimetrically contracting said end rings to exert a continual inwardradial pull upon said conductors to hold the same against the seatstherefor in said slots, expanding said conductors to impingeagainst thesides of said slots, and radially bending the junctures between saidconductors and end rings in applying said Winding to said core.

14. The method of making a rotor provided with a cylindrical core havinglongitudinal peripheral slots and a sheet metal winding havinglongitudinal conductors arranged in said slots and integral circular endrings connected to said longitudinal conductors, consisting in rollingsaid --winding into position upon said core, and perimetricallycontracting said end rings to exert accontinual inward radial pull uponsaid longitudinal conductors to hold the same against the seats thereforin said slots.

15. The method of making a rotor provided with a cylindrical core havinglongitudinal peripheral slots and a sheet metal winding havinglongitudinal conductors arranged in said slots and integral circular endrings connected to said longitudinal conductors, consisting in rollingsaid winding into position upon said core, perimetrically contractingsaid end rings to exert a continual inward radial pull upon saidlongitudinal conductors to hold the same against the seats therefor insaid slots, and expanding said conductors to impinge against the sidesof said slots.

16. The method of making a rotor provided with a cylindrical core havinglongitudinal peripheral slots and a winding havl upon said conagainstthe seats ing longitudinal conductors arranged in' said slots andcircular end rings connected to said longitudinal conductors, consistingin rolling said winding into position upon said core, joining the edgesthereof to form continuous end rings, perimetrically contracting saidend rings to exert a continual inward radial pull upon said conductorsto hold the same against the seats therefor in said slots, and expandingsaid conductors to impingc against the sldes of said slots.

18. The method of making a rotor, consisting in rollin a sheet metalWinding into position upon t 1e core, and then perimetricallycontracting the end rings to exert a continual inward radial pull uponthe longitudinal conductors to hold the same in a fixed position.

19. The method of making a rotor, consisting in rolling a sheet metalwinding into position upon the core, joining the edges of the winding toform continuous end rings, and finally contracting said end rings toexert a continual inward radial pull upon thelongitudinal conductors tohold the same in place.

20. The method of making a rotor provided with a cylindrical core havinglongitudinal peripheral slots and a winding having longitudinalconductors arranged in said slots and circular end' rings connected tosaid longitudinal conductors, consisting in rolling said windin intoposition upon the core, joining the e continuous end rings, setting thelongitudinal conductors in place against seats therefor in said slots,and contracting said end rings to exert a continual inward radial pullupon said conductors to hold the same upon said seats.

In witness whereof, I have hereunto sub scribed my name.

' JOHN M. BARR.

ges thereof to form,

